I have 94 z28 Lt1. It runs good for a little while the all of a sudden it starts to misfire as I drive. I recently changed the sparkplug wires/ spark plugs. An it still does the same it also has coils. I was told it could be the wires I got em from autozone it was all they had.. the brand is bosch. What could I do to fix it?

 

I'm having issues with mine and I can't figure out,but after mine is warmed up it runs horrible it jerks,hesitates,pops,when i accelerate hard or floor it. I've done opti,coil,,fuel filter,icm,fuel pressure is good,spark plugs,wires,are all good/changed,my vacuum and fuel hoses n lines are good too

 

When you say it has coils. Did you do LTCC or similar conversion? Search this site for scan9495. You can tell quite a bit with a scan.